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Multi-Phase Relay Testers

The SMRT46 and 46D are multipurpose, lightweight, field portable test sets capable of testing various electromechanical, solid-state and microprocessor-based protective relays, motor overload relays, and similar protective devices.

You can manually control the SMRT46 and 46D test systems with Megger’s new Smart Touch View Interface (STVI). The SMRT46D has this feature built-in, enabling it to be used without a PC via an intuitive, high-resolution graphic touch screen, whereas the SMRT46 requires an external device.

The STVI is a controller loaded with Megger’s user interface software. Its large, full colour, high resolution, TFT LCD touch screen allows you to perform manual, steady-state, and dynamic testing quickly and easily using the manual test screen and built-in preset test routines for the most popular relays. Menu screens and touch screen function buttons are provided to quickly and easily select the desired test function. Test results can be saved to the STVI for download to a USB drive to transfer or print test reports.

Both instruments can be placed under full computer control via the Advanced Visual Testing Software (AVTS) or the RTMS running on a PC. AVTS is a Microsoft Windows XP/Vista/7/8/10 compatible software program designed to manage all aspects of protective relay testing using the Megger SMRT46.

The test system may also be customised by adding the number of voltage-current modules, called VIGEN modules, needed for specific test applications with a maximum of three channels. For example, the SMRT46 or SMRT46D with three VIGEN Modules provides complete three-phase testing of three-phase impedance, directional power, negative sequence overcurrent and other devices that require a three-phase four-wire wye-connected source. The fourth voltage channel provides an AC reference/synchronising/polarising voltage, or a DC battery simulator voltage source.

The SMRT Solution

Whether you are an Electric Utility (Generation, Transmission and/or Distribution), Relay Manufacturer or Service Provider, Megger has a SMRT Solution for you. We have taken a customized approach to design that ensures our new and existing relay test sets will meet your every need, regardless of the application.

We deliver solutions that help you work smarter.


- Megger stands behind its relay products with a warranty that is twice the industry standard – that’s reassurance you can trust
- Quality from product design concept to production
- Power where you (still) need it most

Ease of Use

-Intuitive yet powerful software is simple enough for the new technician yet comprehensive enough for the most experienced tester
-Error indication and connection diagrams provide audible and visual indicators for improved accuracy


- Portability – Easy to lift and carry, even to the most remote corner on the highest floor in your generating plant or on that flight with you to your next customer site
- Flexibility – Combine multiple test sets to increase total number of channels, while controlling from a tablet, STVI or PC


Multi-phase Relay Tester

  • Integrated Smart Touch View Interface.
  • Multi-colored graphics with intuitive navigation
  • Stand-alone operation, no PC required to operate
  • High current output - 60 Amps at 300 VA per phase
  • Flexible output design provides up to 10 currents
  • Dynamic, Transient and GPS Satellite Synchronized End-to- End Testing Capability
  • IEC 61850 Testing Capability

The SMRT410D is a multipurpose, light-weight, field portable test set capable of testing a wide variety of electro-mechanical, solid state and microprocessor-based protective relays, motor overload relays, and similar protective devices.

The unit can be operated either manually via the built-in touchscreen user interface, or placed under full computer control via the AVTS, Advanced Visual Testing Software, or the STVI-software running on a PC. In addition, with the open communication architecture, the unit can also be used with third-party software programs such as National Instruments LabVIEW™.

The built-in user interface, called the Smart Touch-View Interface™ (STVI), is Megger’s second generation of automatic / semi-automatic manual user interface software. It incorporates a large, easy to read full color, high resolution, high definition, TFT LCD touch-screen display, which displays metered values such as AC and DC Amperes, AC and DC Volts, and Time in both seconds and cycles. Depending on the type of test selected, other values may be displayed, such as Phase Angle, Frequency, Ohms, Watts, VA, or Power Factor.

SMRT410D Details


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